Multiplex communications – Wide area network – Packet switching
Patent
1992-10-13
1998-07-14
Beausoliel, Jr., Robert W.
Multiplex communications
Wide area network
Packet switching
370217, 370220, 370221, 370225, 370228, G01K 3108, G06F 1100
Patent
active
057817154
ABSTRACT:
A fault-tolerant bridge/router ("brouter") with a distributed switch-over mechanism of the present invention can tolerate any single failures and does not rely on network reconfiguration (or alternative paths) and, therefore, substantially improves system reliability/availability. The fault-tolerant brouter utilizes a plurality of processing elements communicating through a multiple-bus switching fabric. Each processing element can effectively support two ports, each port providing an interface to an individual LAN. Each LAN is then linked to two different ports on two different processing elements, respectively, thereby providing processing element redundancy. If a processing element fails, bridging/routing functions can be performed by the other, redundant processing element. The functions are switched using the switch-over mechanism. Because the switch-over mechanism is distributed, no centralized control mechanism is required.
The fault-tolerant brouter of the present invention provides the prevention of packet loss so that a source station does not have to resend lost packets blocked due to a failed processing element and provides transparency to end stations so that the packet recovery is independent of the networking protocols implemented. In addition, due to the redundancy of the processing elements for each LAN, traffic from unlike LANs with different media speeds can be evenly balanced. In this manner, the fault-tolerant brouter of the present invention provides significant improvement in system reliability and availability.
REFERENCES:
patent: 4306313 (1981-12-01), Baldwin
patent: 4837856 (1989-06-01), Glista, Jr.
patent: 4847837 (1989-07-01), Morales et al.
patent: 4897841 (1990-01-01), Gang, Jr.
patent: 4984240 (1991-01-01), Keren-Zvi et al.
patent: 5016244 (1991-05-01), Massey, Jr. et al.
patent: 5088091 (1992-02-01), Schroeder et al.
patent: 5103446 (1992-04-01), Fischer
patent: 5132962 (1992-07-01), Hobgood et al.
patent: 5161156 (1992-11-01), Baum et al.
patent: 5198808 (1993-03-01), Kudo
patent: 5200949 (1993-04-01), Kobayashi
patent: 5218600 (1993-06-01), Schenkyr et al.
patent: 5218601 (1993-06-01), Chujo et al.
patent: 5239537 (1993-08-01), Sakauchi
George Varghese, "Transparent Interconnection of Incompatible LAN Using Bridges", vol. 8 No. 1, Jan '90.
Ron Liften, "RND's Ethernet Brouter Family-An Inside Look", Oct. '89, vol. 12 No. 5.
Magda el Zarki, "A Distributed Routing Scheme for Networks of the Future", 1990, pp. 81-87.
Debbie Shimman, "Enter The Brouter: An Update on Linking LANs", Nov. '88, pp. 38-43.
IBM Tech Bulletin, "Token Ring Communications for Power/Logic Monitoring in Large Computer Systems", Nov. '90, vol. 33 No. 64.
Lurie, "Wellfleet BN Routers", 1992.
Brunner et al., "Fault Tolerant Interconnect . . . ", 0-430-569-41, Nov. 21, 1990.
Beausoliel, Jr. Robert W.
International Business Machines - Corporation
Keohane Stephen T.
Timar John J.
Vales P.
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